Name: Contrec 104D.2
Brand: Contrec
SKU: 104D.2
Availability: InStock

The Contrec 104D.2 is the wall-mount version of the 104D Flow Rate Totalizer, housed in a weatherproof field enclosure with standard cable glands for outdoor or process-area installation away from a control panel. It carries the same core function as the standard 104D: a loop-powered pulse-to-4-20mA retransmit totalizer that reads a pulse or frequency signal from a turbine, positive displacement, or paddlewheel flowmeter and turns it into both a local rate display and a proportional 4-20mA output back to your control system.

Since the unit is powered entirely from the same 4-20mA loop it feeds, there’s no separate power cable to run to the field location, which simplifies wiring for a remote or outdoor mounting position. A 10-point linearization curve keeps the displayed rate and the retransmitted signal accurate across the full flow range, even when the flowmeter’s raw output isn’t linear. Dual alarm outputs and an onboard totalizing register make it a complete, self-contained flow instrument for sites where a panel-mounted unit isn’t practical.

Contrec Model 104D.2 (Wall Mount) Technical Specifications
● POWER SECTION
Power Input Requirements	Loop Powered: 4 to 20 mA DC current loop connection. Voltage Drop: 4.3 Vdc maximum loop drop threshold. Internal Backup: 2 × Lithium batteries installed as standard; provides up to a 2-year autonomous local display lifespan.
Data Security Retentivity	Integrated non-volatile flash memory permanently stores all configuration parameters, tag constants, resettable totals, and accumulated totals during full loop power blackouts.
● INPUT SECTION
Flowmeter Signal Input	Single digital flow input channel accepting pulse or frequency train inputs. Compatible Sensors: Open Collector, Reed Switch, TTL Logic, Magnetic Pickup, Namur Proximity, or Paddlewheel flow sensors.
Frequency Bandwidth Range	0.1Hz minimum baseline cutoff up to 2kHz maximum high-speed input processing frequency.
K-Factor Scaling Matrix	Fully programmable pulses-per-unit metric system supporting a 10-point non-linear flow linearization curve mapping.
● OUTPUT SECTION
Analog Output Loop	2-wire 4 to 20 mA DC current loop output; tracks real-time flow rate with programmable zero and full scale span mapping.
Digital Output Channels	Two separately opto-isolated solid-state open collector transistor outputs: Output 1 (Pulse): Scaled pulse output channel with software-defined resolution and pulse width. Output 2 (Alarms): Configurable as a combined High Flow Rate and Low Flow Rate limit alarm output. Electrical Rating: Max. 30 Vdc switching voltage, 100mA maximum current capacity in the active “ON” state.
Local Operator Display	High-contrast dual-row alphanumeric LCD display showcasing simultaneous Flow Rate, Resettable Batch Total, and non-resettable Accumulated Total in selected engineering units.
● PERFORMANCE
Totalizer Accuracy Class	Better than ±0.05% of reading for all internal mathematical accumulation calculations.
Analog Loop Precision	±0.1% of full scale range calibration accuracy under reference conditions.
● PHYSICAL
Enclosure Shell Design	Field-mounting enclosure layout molded from heavy-duty, impact-resistant polycarbonate polymers.
Mounting Configuration	Versatile architecture supports flush panel mounting, wall surface installation, or ruggedized pipe track attachment.
Operator Input Interface	Ergonomic elastomeric tactile keypad featuring positive snap-action feedback designed to support glove-wearing operation.
● STANDARDS CONFORMITY
Environmental Protection Class	IP67 dust-tight and weatherproof certified enclosure containment structure (Fully matches NEMA 4X compliance criteria).
CE Certification Baseline	Conforms fully to standard European community electromagnetic compatibility (EMC) and low-voltage electrical safety directives. Manufactured under a certified ISO 9001 quality framework.